Magnetic characteristics of epitaxial Ge(Mn,Fe) diluted films -: a new room temperature magnetic semiconductor?

被引：23

作者：

Braak, H ^{[1
]}

Gareev, RR ^{[1
]}

Bürgler, DE ^{[1
]}

Schreiber, R ^{[1
]}

Grünberg, P ^{[1
]}

Schneider, CM ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 286卷

关键词：

magnetic semiconductor; molecular beam epitaxy; germanium;

D O I：

10.1016/j.jmmm.2004.09.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We prepare 100 nm thick, epitaxial Ge100-(x+y)(MnxFey) diluted films with Mn and Fe concentrations of several at% using a layer-by-layer deposition scheme at elevated temperature. We measure saturation magnetization m(s) versus temperature curves for a variety of (x,y) combinations and find for fixed temperatures a non-trivial dependence of ms on x and y. Within a certain window in the (x,y) parameter space Ge100-(x+y)(Mn-x,Fe-y) exhibits a Curie temperature of 350 K and m(s) approximate to 10 emu/cm(2) at room temperature. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：46 / 50

页数：5

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